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                BJOI2015 树的同构                </h1>
                <p>时间限制：10s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  空间限制：256MB</p>			</div>
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                                <h3>题目描述</h3><p><div>树是一种很常见的数据结构。</div>
<div>我们把N个点，N-1条边的连通无向图称为树。</div>
<div>若将某个点作为根，从根开始遍历，则其它的点都有一个前驱，这个树就成为有根树。</div>
<div>对于两个树T1和T2，如果能够把树T1的所有点重新标号，使得树T1和树T2完全相</div>
<div>同，那么这两个树是同构的。也就是说，它们具有相同的形态。</div>
<div>现在，给你M个有根树，请你把它们按同构关系分成若干个等价类。</div>
<p></p></p><hr/><h3>输入格式</h3><p><div>第一行，一个整数M。</div>
<div>接下来M行，每行包含若干个整数，表示一个树。第一个整数N表示点数。接下来N</div>
<div>个整数，依次表示编号为1到N的每个点的父亲结点的编号。根节点父亲结点编号为0。</div>
<p></p></p><hr/><h3>输出格式</h3><p><div>输出M行，每行一个整数，表示与每个树同构的树的最小编号。</div>
<div></div>
<p></p></p><hr/><h3>样例输入</h3><pre>4 
4 0 1 1 2 
4 2 0 2 3 
4 0 1 1 1 
4 0 1 2 3 </pre><hr/><h3>样例输出</h3><pre>1 
1 
3 
1 
 </pre><hr/><h3>提示</h3><p><div>【样例解释】&nbsp;</div>
<div>编号为1, 2, 4 的树是同构的。编号为3 的树只与它自身同构。&nbsp;</div>
<div>100% 的数据中，1 &le; N, M &le; 50。&nbsp;</div>
<p></p></p><hr/><h3>题目来源</h3><p>没有写明来源</p>
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